Plasterer&#39;s implement



Oct. 8, 1940."

C, J. JACOBSEN ET AL PLASTERER S IMPLEMENT Filed Feb. 7, 1939 Patented Oct. 8, 1940 PLASTERERS IIPLEMENT l sa ttistonej Charles J Jacobsen and Hugo Battstone, Wash- .ington, I). (2.; said Jacobsen assignor to said 2 Application February 7, 1939, SeriaiNo. 255158 9 Clarns. '(CL306-38) Our invention relates to p1aLsterers-"implements and-morte particularly tostraight-edgesfor use by plasterers in finishirig the interior plaster work in buildings and includes an implement designed for finishing the corner portions as well as the plane surfaces of -walls and ceilings; and the nature and 'objects of theinvention will be readily 'recognized' and undrstood :b'y those skilled in the "arts to which it'relates in the 1odight of theio1lwing explanation and detailed description of th ;accompanying drawing illus-- t1ating what we at* bresmnt believe to be the preferred embodimnt ormechanical expressions of our invention from afiiong variousother forms, I5=arrngemets; co1ribihations and constructions,

of which the invention 'is capble within' the spirit and scope thereoi: 1- The usual type 'of plasterers imp1ement which isnowinuse- V 1 o'f wa1is and ceiiing's consists of a*handie p01- tion and a straight djgeb1adewhichmay ne either of the square ed'ge type or of the feather edge type or the, 1ike. The straight edge blade or surface is usuall made of'wood, and, therefore, becomes warped and otherwise damaged in of this type in which'thebiad and handle are conStructed ir1one biece; it is, thereioi, ieces sary 'When the blade loses itsfutility'to discard the entire. implmenc; even though the handle may be in De1fectconditipnf Such prdcedure is costly and constitutesa'needless waste'. In such too1s that are construoted with a removable blade, 5 diflicuity has been encountered' in so mounting and attaching aineW blade to the haLndle as to present a suffient1y true nd straight dge which is essentia1 for the type 6: Woi'k for which the implement is designed. Easje ogf assembly- It is therefore an object of this invention" to 'provide a plasterersimpienient which Overcoms this expenSivedefet whih is ndw inherent' in suCh to]s.

provide a piasterers irhpleinent s'o designed that blades may be attached therto to 'replaceblades which have been damaged, 1 r

to provide means on:the handleioreasily re- -:ceiving a .newblade thereon and,fasteningthe forfinishing the interior surfaces usefso as tobe usless"to berforin"the v'vork for whih it is designed; In 'plasterers implments It is f1irther} ob-ject 'of this invention to- "the handle mabe' 'usd indefinitely and new* A furthercharacteristic of this invention is blade threto.in' a manner toc insure the true positioning of the blade.

A still furtheb object of this invention is to provide a plastrer's implement which is accurate in its positioning of new blades thereon and yet economical'in its original construction and in the upkeep thereof.

It is also' a characteristic of this invention toprovide a piastrers implenient to which a blade may be quickiy attachd and automatically trud thereon with a minimum amount of attention from the user, and one from which ablade rhay be removed with great facilit.

"A stiil furthr object of this invention is to provide a piaterers toc] desig'nedior the removai and attachment of blades to the handle thereof, there being provided a coarse' and a fine adjustment for truir1g and securing the blade thereon.

'With the foregding ge'ner al objects features, and results in view, as well as Certain others which will be apparent from the folldwing explanation', the invention consists in certain novel features in design, c0nstruction, mounting and combination of'elemnts; as 'will be more fully and narticulaily referred to'and specified hereinafter.

Refrringto the accomznanying drawing: Fig. 1 is a perspective view of the assembled deVicei v '-2fis a secton taken on the line 22 of Fig-L 1, showing the position of the elements before the blade has been tghtenedon'the handle. Fig. 3 is a Section similar to that shown in Fig; '2 with parts brokn aWay, and shows the position of the elernexits after the blade has been tightehd on the handle.

Fig; 4 ma Section similar to"that shown in Fig. 2, with a Square blade instetd of a feather edge blade applied to the handle.

Referring to the drawing,'the long relatively narrow handle of the plasterei"s implement is pref erably made of wood and is provided on oppoSitesides thero withelongmted concavities 3' which serve as fingerholds for the operato'r or operators of the device, and is further formed with the lower corners out off diagonally to facilitate the operation of the straight edge in th'ewanglesbetwee wa1ls, ceilings, and the 1ike. Ittis:t0 be undrstood that our plasterers implement may be madelin varying lengths as desired, and :may be operatedat one time by one or more men depending on the length of the implement.- v

-.The upper longitudinal edge of the, handle is the numeral 5, and a channel member 1 of substantially U-shape havng upwardly converging sides 9 is secured'to the upper longitudinal concave edge of the handle, and is so disposed thereon that the base of the channel member rests on the edges of the concavity and extends thereacrss. The channel 1 is a metaliic member formed jof braSs, aluminum or the 1ike metal of a gage'to insure a certain degree of resiliency. For the purposes of our invention as will be described in detail hereinafter, it is necessary that the channel be made of a metal having sufiicient resiliency so that ,under certain conditiohs it may be so distorted as to buckle or flex in its base portion to 'extend or bend into the concavity 5 of the handle. At the time of distortion of the base portion:othe chahnei member 1 it is to be noted and will .be made aiear later in the description of this invention that the upwardly converging sides 9 of the channel member will be bent t extend'inwardly to a greater degree than when the channel member is in normal position as shown in Fig. 2 of the drawing;

The base or bottom portion of the channel member 1 which extends across the concave longitudinal upper edge of the handle is drilled to provide a plurality of spacedholes therein for receiving screws H which are adapted toscw into the wooden handle I for securely fastening the channel member to the top edge of the handle in the proper and desired true position. Whiie we have shown only two of such channel securing screws it is apparent, of course, that any desired number may.be used to properly and firmly attach the channel member to the handle. The channel member 1 is secured to the handle, by means of the screws which have just been described, in the proper and desired position to accurately dispose a blade therein when the device is being assembled for use.

The straight edge or blade which is preferably formed of a Wood, such as White pine or the like, is constructed in the form of a feather edge blade [3 or a square edge blade 14 as disclosed particularly in Fig. 4, or in any shape or form found useful in performing a particular type of work. The blade l3 whether it be of the feather edge type, or the square edge type or the li ke, is

adapted to be removably received in the channel member 1 in proper and true position therein, and each blade is provided with a cut-out sec-' tion l 5 along the iower portion of the opposing sides thereof. Thecut-out portion is made of a size to relatively 1oosely and slidab]y receive therein the upstanding converging sides 9 of the .metal1ic ,channel member. The :blades I3 are produced in varying lengths, a .particular blade being selected for use which is of the same length as the handle with which it is to be associated, and when. a blade is in position in the channel the upstanding sides 9 fit into the cutout portions l5 in such.manner as to present fiat .,substantially unb roken surfaces to the, sides of "the blade.

As hereinbfore pointed out the channel member 1 is ;secured in proper and accurate position on the handle by the screws:l I, and as the blade is loosely received in thechannel 'it is necessary to tightly secure the bladein true position 'within thezchannel member .so as -to' be heldtherein against rmoval upon being'submitted to stresses and strains encountered in actual woi k.

Th mansl'by which vi'tghtly' secure the for each hole 19 in the channel member. and as these are alined it is apparent that an opening extends from above the base of the channel member to the bottom'edg of the handle I. Placed through each of the holes [9 in the channel member from above and extending downwardly into the handle -hole 2l is a hollow interiorly threaded bolt 23 having a fiaring head 25 which rests.upon. the top surface of the base of the charine] member. While we have shown only two :of such bolts it .is apparent that any number may be used which may be Iound advantageous. The base of the blade 13 is provided with a iongitudinally extending centrally disposed devetailed groove 21 for longitudinally slidabiy receiving the fiaring head 25 of each bolt 23. When the blade is in position entirel within the channel member it is tightly secured and trued on the handle by means 01 screW 29, the head 3! of which is disposed in 3. socket formed in the lower edge of the handle -I and bears .against a metallic disk 33. A screw 29 is provided for each bol-t 23 which is being used in the device, and the .shank of each screw extends upwardly and threads into the hollow bolt 23. Therefore, by screwing each one 01 the screws29 into the hollow bolt 23 the blade L3 will be tig=htly secured in true position within the channel member as disclosed in Fig. 3 of the drawingpafiicularly, and conversely by unscrewing the scrw 29 the blade Will be loosely held 'in the Chantiel member l as disclosed particuiafly in Fig. 2 of the drawing.

Assuming that the blade [3 in Fig. 2 of the drawing fis damaged and 'it is desired to remove the same rom the handle for attachment of a new blade thereto. The blade in this particular figure of the drawing is 'loosely or longitudinaily slidably disposed Within the .metilic channel member because' the screW .is' not screwed up tight]y into the bolt, hence 'it is merely necessary to slide the blade out of the'tzhannel member from either and thereof, and upon complete removal of the blade a new blade and into either end of the channel member, As a new blade is slid into. the channe'l member the flaring heads 25 are received into "the groove 121 iormed in the base o f theblade and the sides 9 of the. channel member are received in the portions l5 on the blade. With the blade disposefl Wthin the resilient chaume] member and biore the serew is tightened it 15 h6ld on the handle. in relativeiy accurate or coarse adjustment, 'however, before using the impiement in actual work the user must tightly secure the. blade on the handle which, as will be exDlained. -automatically trues the blade on the handle. With the bladeslidabiy disposed in the channei member as disclosed, particularly in Fig. 2 of the drawing, the screw 29 is screwed into the holiow boit 23 which draws the blade downwardly into the.resilient charme] member through the action ofthe flaring head '25 of the bolt within th'groove :21. Such tightthe channe member. ThefloWer'5ur-ae of the fiaring head engage the top. surface of the base; of the channelmember to bend or distortzit downwardly to.fiex into the concavity 5 'asdis-.

closed, particularly in Fig. 3 of the drawing. The

arrangement of.a concave surface upon 'which' the resilient channel member is disposed insures distortion thereof upon the application of=the proper pressure, and such distortionv results in tightly securing and fastening the blade in rigid and true position. When the base of .the c han nel member fiexes into the c0ncavity .the upstanding sides 9 thereof W111 be forced inwardly" to bite into the opposite sides of the blade t0 accurately and truly position the blade, thereby lockingit against removal fromthe handle. This distortion of .thejchannel member which causes the sides 9 t0 bite into and securely hold the blade in position insures an automatic truing of the blade due to the fact that the channel member itself is held in proper position on the handle by means of the screws H, and as the tension on each of the upstanding sides 9 will be equal due to the medial position of head 25 of the bol-t With respect to member 1, the blade will automatically be disposed in true position. A fine adjustment is thus automatically achieved when the blade is securely fastened within the channel member and the implement is ready for actual use.

The square edge type of blade as disclosed by numeral [4 in Fig. 4 of the drawing and any other useful form of blade is constructed with the same elements for cooperation With the handle securing means as is the blade l3 which has been described, and hence it is not believed that a detailed description of this type of blade is necessary.

What I claim is:

1. A lasterers implement including a handle having a concave edge and a resilient member mounted on said concave edge and distortable to fiex thereinto, a blade adapted to be received and locked in said resilient member, an element associated with said blade and depending therefrom through said reslient member into said handle, and means within said handle operatively connected with said element for exerting pressure thereon to cause distortion of said resilient member.

2. A plasterers straight edge and the like, comprising a longitudinally elongated blade; and a longitudinally elongated handle-forming carrier, said blade and said carrier being removably secured together in normal parallel longitudinal relationship with the blade and carrier in a common longitudinal plane, adjoining longitudinal parallel portions of the carrier and blade being of substantially the same transverse thickness, said blade substantially throughout its length having a longitudinal base portion, said carrier at a straight longitudinal edge being provided with a longitudinal channel secured thereto and complementary to said blade base for longitudinal endwise sliding of the blade into and from the channel, said channel and blade base being so formed as to interlock against relative lateral transverse separation, and means for locking the blade against and for releasing the same for endwise sliding movement from the channel.

3. A plasterers straight edge, comprising a removable longitudinally elongated straight edge blade formed with a longitudinal base having a longitudinal portion of reduced transverse width, said blade also formed with a longitudinal substantially dovetailed groove opening through the tively associated ;with said channel toflex the same for clampingthe blade base.;between the channel sidewalls, said clamping means includ ing at least a projecting portion in said blade groove.-

normally located 4. A sterers str t ed ,ccmp s n z longitudinally elongated straig;ht edge-blade of uniforxn,cr oss sectional dimensions substantialy th o g u ul ;le.n th,- and a. itud n y elongated handle-f0rming carrier normally secured to and arranged longitudinally of and parallel With said blade; said blade throughout its length having a longitudinal base portion and a longitudinal groove extending substantially throughout the length of said base portion with a relatively narrow longitudinal side slot opening through the floor of said base between the longitudinal side faces thereof, a channel secured to said carrier and arranged longitudinally along a longitudinal edge thereof and having upstanding side walls or flanges, said channel in cross section being complementary to the blade base in cross section to receive and hold the same, and clamping means mounted to said carrier and comprising a head arranged in said groove of the blade base, and enlarged above said side slot, for clamping the blade down in the channel.

5. A plasterers straight edge, comprising a longitudinally elongated blade having a longitudinal base portion, and a handle-orming carrier provided with an edge having a substantially centrally depressed longitudinal floor and marginal parallel longitudinal elevations, a resilient channel secured to said carrier and arranged longitudinally of said carrier straight edge with the flanges of the channel upstanding and the channel floor seated on said longitudinal elevations, the base of said blade being complementary to said channel, and clamping means operatively associated with the floor of said channel to flex the same toward said depressed floor of said carrier edge to thereby press the side walls of the channel into clamping engagement with the side walls of the blade base.

6. A plasterers implement including a longitudinally elongated handle-forming carrier provided along a longitudinal edge thereof with a longitudinal blade-clamping channel of substantially dovetail formation in end elevation, said channel including opposite upstanding longitudinal marginal flanges capable of transverse movements, a longitudinally elongated removable straight edge blade having a longitudinal base portion ofsubstantially dovetail formation complementary to said channel, said blade base having a longitudinal groove opening through at least one end thereof and longitudinally opening laterally through the bottom of said base, said groove being of substantially dovetail formation, and clamping means associated With said carrier for clamping said base down in the channel and for pressing said flanges laterally inwardly t0 clamp said base, said means including at least one head in said base groove and operativelyassociated With said flanges, and manually actuated screw-threaded connections.

7. A handle-forming carrier for the removable longitudinally elongated blade of a plasterers straight edge, s'aid carrier provided with a lm' gitudinally longated resilient 'channel secured thereto longitudinally of a longitudinal edge, with its opposite marginal clamping fianges upstanding, said carrier provided with manually actuated means for flexing said channel ta force said fianges laterally substantially toward each other to blade -clamping positions.

8. An applicable and removable blade -for the handle-orming carier of a plasterers straight edge, said blade being longitudinally elongated and of substantially uniform'cross sectional dimensions throughont its length, said blade having a longitudinal base portion of substantially dovetail formation in end elevation, said base portian having a substantially dovetail longitudinal HUGO BATIISTONE. CHARLES J. JACOBSEN. 

